.addxin {
    float: left;
    position: absolute;
    left: 670px;
    top: 132px;
    width: 700px;
    height: 45px;
    border: 2px solid #2d241d;
    font-size: 18px;
    color: #2d241d;
    font-weight: bold;
    text-align: center;
    line-height: 45px;
}

.xin {
    width: 700px;
    height: 300px;
    border: 2px solid #2d241d;
}

.xin li {
    margin: 10px;
}